Add 1s timeout to metadata subscriber in embeddings maintainer (#13947)

frigate/embeddings/maintainer.py

@@ -151,7 +151,7 @@ def _process_finalized(self) -> None:
 
     def _process_event_metadata(self):
         # Check for regenerate description requests
-        (topic, event_id) = self.event_metadata_subscriber.check_for_update()
+        (topic, event_id) = self.event_metadata_subscriber.check_for_update(timeout=1)
 
         if topic is None:
             return